Observational signatures from horizonless black shells imitating rotating black holes

@article{Danielsson2018ObservationalSF,
  title={Observational signatures from horizonless black shells imitating rotating black holes},
  author={Ulf H. Danielsson and Suvendu Giri},
  journal={Journal of High Energy Physics},
  year={2018},
  volume={2018},
  pages={1-24}
}
A bstractIn arXiv:1705.10172 it was proposed that string theory replaces Schwarzschild black holes with horizonless thin shells with an AdS interior. In this paper we extend the analysis to slowly rotating black holes, solving the Israel-Lanczos-Sen junction conditions for a rotating shell composed of stringy matter to determine the metric. Outside of the shell we find a vacuum solution that differs from Kerr with a 32% larger quadrupole moment. We discuss the observational consequences and… 
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